What Is the Cause of Autism?

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Multiple factors are probably involved in Autism. The idea is about what caused it have gone back and forth within the last decades. I think the most researchers would agree that it's a combination of genetic risk factors as well as non genetic factors. By possibly the immune system is involved, but in what way and how, is unclear.

If it is, it could well be that it's involved in the during the first or second trimester, and that it interacts with genetic vulnerability to trigger a non folding of abnormal organisation of brain development.